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38/23 Tooth T-bolt
The 38/23 Tooth T-bolt design bolt head can effectively prevent the bolt from being over-threaded, There is a notch mark on the end of the screw to facilitate correct installation and positioning. The 38/23 Tooth T-bolt surface adopts hot-dip galvanizing process, the thickness of the zinc layer is 55um, to ensure the smooth screwing of the nut and bolt.
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Product Description
38/23 Tooth T-bolt
1. Features and advantages
1. The diamond-shaped design of the bolt head can effectively prevent the bolt from being over-threaded
2. There is a notch mark on the end of the screw to facilitate correct installation and positioning
3. Multi-station cold heading process, sharp and full, stable performance, beautiful appearance
4.8.8 level mechanical properties, superior tensile, shear, fatigue, and fire resistance
5. The surface adopts hot-dip galvanizing process, the thickness of the zinc layer is 55um, to ensure the smooth screwing of the nut and bolt
2. Design bearing capacity value table of T-bolts with different thread diameters, materials and strength grades.
The Nrd is the tensile load value, the Vrd is the shear load value, Mrd is the bending resistance when the cantilever is subjected to transverse load, that is, the design value of bending moment
|
Bolt Type |
Carbon steel 8.8 grade |
Stainless steel (SUS316L) A4-80 |
||||||
|
Nrd tensile |
Vrd of shear |
Mrd of moment/single bolt |
Tinst of torque |
Nrd tensile |
Vrd of shear |
Mrd of moment/single bolt |
Tinst of torque |
|
|
38/23 M12 |
44.9 KN |
27.2 KN |
61.2 N·m |
84N·m |
31.6 KN |
23KN |
58.8 N·m |
70N·m |
|
38/23 M16 |
83.7 KN |
50.5 KN |
155.4 N·m |
200N·m |
58.8 KN |
33KN |
116.6 N·m |
193N·m |
3. National Building Materials Testing Centre.
|
Number |
Testing projects |
Detection methods |
Unit |
Technical requirements |
Test results |
Individual assessment |
|
1 |
Fatigue test |
TB/T 3329-2013 |
/ |
After 500,000 fatigue tests, groove and T bolts, groove The failure load value of the connection with the anchor rod does not decrease by more than 5% compared specified minimum value |
After fatigue test, the specimen was not damaged. A limit failure load of 23.4 KN,2.5 per cent lower than the specified minimum |
Qualified |
